# sum_67





Return the sum of the numbers in the list, except ignore sections of numbers starting with a 6 and extending to the next 7 (every 6 will be followed by at least one 7). Return 0 for no numbers.

This exercise was taken from [codingbat.com](https://codingbat.com/prob/p111327) and has been adapted for the Python language. There are many great programming exercises there, but the majority are created for Java.






### Test 1
**Input:**
```
[1, 2, 2]
```
**Output:**
```
5
```
### Test 2
**Input:**
```
[1, 2, 2, 6, 99, 99, 7]
```
**Output:**
```
5
```
### Test 3
**Input:**
```
[1, 1, 6, 7, 2]
```
**Output:**
```
4
```
### Test 4
**Input:**
```
[1, 6, 2, 2, 7, 1, 6, 99, 99, 7]
```
**Output:**
```
2
```
### Test 5
**Input:**
```
[1, 6, 2, 6, 2, 7, 1, 6, 99, 99, 7]
```
**Output:**
```
2
```
### Test 6
**Input:**
```
[2, 7, 6, 2, 6, 7, 2, 7]
```
**Output:**
```
18
```
### Test 7
**Input:**
```
[2, 7, 6, 2, 6, 2, 7]
```
**Output:**
```
9
```
### Test 8
**Input:**
```
[1, 6, 7, 7]
```
**Output:**
```
8
```
### Test 9
**Input:**
```
[6, 7, 1, 6, 7, 7]
```
**Output:**
```
8
```
### Test 10
**Input:**
```
[6, 8, 1, 6, 7]
```
**Output:**
```
0
```
### Test 11
**Input:**
```
[]
```
**Output:**
```
0
```
### Test 12
**Input:**
```
[6, 7, 11]
```
**Output:**
```
11
```
### Test 13
**Input:**
```
[11, 6, 7, 11]
```
**Output:**
```
22
```
### Test 14
**Input:**
```
[2, 2, 6, 7, 7]
```
**Output:**
```
11
```